Manley Big Block Chevrolet Extreme Duty Exhaust Valve - 5.522in Overall L 1.900in Diameter - Single

12739-1

Today, Manley Performance continues to re-define itself in a high performance aftermarket industry that is constantly evolving. We've developed new products for growing markets such as sport compact, Ford modular and Chevy LS; as well as maintained our leadership role with the traditional V-8 engine business.

Features:

• XH-432 XtremeAlloy Exhaust Material
• NK-844 Stainless Intake Material
• Greater Flow and Less Weight
• Reduced Stem Diameter
• Chrome Stems and Hard Tips
• Swirl Polished and Fully Machined

Specifications:

• Type: Exhaust
• Head Diameter: 1.9
• Stem Diameter: 0.3415
• Installed Height: .100 Longer
• O/A Length: 5.522
• Tip Length: 0.25
• Underhead (angle/redius): 18° x 1/2"
• Margin: 0.075
• Seat Width: 0.085
• Top of Head: 12° Dish
• Wgt/Grams: 136
• Sold individually

Fitments:

• Big Block Chevrolet

Note:

• Pictures are for representation only. Actual product may vary